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 A Q= - 3.0 nC point charge and a Q=  - 9.0 nC point charge are 5 cm apart on the x-axis.

Find the point on the x -axis where the electric field is zero.

Hint: Draw Electric vectors for both charges at a point between the two charge, and also at a point outside of the two charges on the right side of Qand on the left side of Q1

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